1, the metal shell has good heat dissipation, but the plastic, leather case or soft rubber is poor. However, metals can affect cell phone signals. If the cell phone signal is not very good, it is not recommended to wear a metal case.

2, each has its own advantages, silicone is soft and resistant to falling, but it is easy to age and change color, and it is not easy to clean. Metal, high hardness, cold, easy to deform, easy to rust, easy to cut the original paint of mobile phone. Hard rubber (PC, ABS and other engineering hard plastics) is cheap, transparent, easy to clean, brittle and not easy to fall. Cloth and leather, high-grade, commercial, easy to get dirty and easy to break.

3, mobile phone case, designed and produced to protect mobile phones. In the middle and late 1990s, with the opportunity of slimming mobile phones, mobile phone protective covers became popular, which also protected the development of mobile phones for aesthetic purposes.

4. With the increase of brand and function of mobile phones, their types are diversified, including leather, silicone, cloth, hard plastic, soft plastic, velvet and silk, while straight and flip phones are also different according to their models. Limited by the model, the applicable categories of mobile phone protective covers are also different. Straight board can usually use all kinds of mobile phone cases, and sliding folding can only choose leather cases.